What is the standard measurement for determining a 30-second reference point from the drop zone?

The standard measurement for determining a 30-second reference point from the drop zone is 2000 meters from the lead edge. This distance allows jumpers to have proper separation from the aircraft and ensures that they are positioned to land safely within the designated drop zone while giving adequate time for a safe exit and descent. Setting the 30-second reference point at this specific distance helps in coordinating the drop sequence and improving the accuracy of the drops.

Other distances may not provide the same level of safety or accuracy, which is why 2000 meters is established as the standard for this reference point.